Yellow Clown Gobies
 

I was wondering if it was better to keep 2 of these fish in a 55 gal., or do they like to be kept by themselves?

It is best just keep one, as they will fight if kept together. :sad:

I agree with Bob, clown gobies seem to do better when kept alone, although I have seen groups of 3's and 5's doing well also in larger reefs.